A shitmiss is when you miss without realizing why, seemingly for no reason. It can also be when you miss an easy hit, usually repeatedly. A shitmiss usually occurs in the form of a choke.
Guy 1: *almost FC, chokes*
Guy 2: lol
Guy 1: I KEEP SHITMISSING FUCK THIS GAME
When someone or something has a really spectacular crash resulting in them and whatever they were riding on being thrown around in a cement mixer'esque fashion.
Often with comical results
Man that bloke got absolutely shitmixed when he stacked his Windsurfer.
I was bricking along then i hit a rock and got absolutely shitmixed!
As the family looked out at Mt. Rushmore, a bird flew overhead and took a shit on the mountain. The boy saw this and said; "Mom, that bird made it Mt. Shitmore."